<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>009-SVG圆形</title>
</head>

<body>
    <svg xmlns="http://www.w3.org/2000/svg" version="1.1">
        <circle cx="100" cy="50" r="40" stroke="black" stroke-width="2" fill="red" />
    </svg>
    <!-- cx和cy属性定义圆点的x和y坐标。如果省略cx和cy，圆的中心会被设置为(0, 0) -->
    <!-- r属性定义圆的半径 -->
</body>

</html>